Automatic tire pump



Mar; 13, 1923.- 1,448,248

G. H. ANTHONY AUTOMATIC TIRE PUMP Filed Aug. 3l, 192]` ze 9 a 4,2%*

Fatentecl 24.3, i923.

@iillllill ATOIYIATIC TIRE PUMP.

Application filed August 31, 1921. Serial No. 487,64.

lle it known 'that l, (inonnr. H. N'rnoNv, a citizen of the llnited States.2 residing at Sykesville. in the county of Jefferson and State or' Pennsylvania, have invented cer tain new and useful Improvements in Antw matic Tire Pumps. of which the following is a specification, reference heing had to the,

accompanying drawings.

lt is the purpose of the present invention to provide a device Ot' this kind for automatically keeping the tires of an automobile pumped up. while the wheels are in motion1 and in order to carry this out it is the aim to provide means actuated by operative connections with a cam or other device on the axle. so as to impart reciprocating movements to the piston ot' the pump, in order to inject air into the tire, while the wheel is in motion.

.inet-her purpose is the provision of safety means to relieve the excessive pressure of air, so as to avoid injecting too great a pres sure of air in the tire.

Still another purpose is to provide means to hold the pumping device out of operation.. after the tire has heen initiated to `the desired pressure.

.i. further purpose the provision of means `for fastening the pump to the automohilc wheel, whereby the piston ot' the pump may operativelyY connect with means on the axle, so to inject the air into the tire. automohile shall he matic air pumping' tires ma;vv he kept pressure.

llfhile thc design and construction at present illustrated and set forth are deemed equipped with an autodevice. so that all the mila-ted to the desired preferahle, it is ohvious that as a result of a reduction of the invention to a more practical form t'or commercial purposes, the invention may he susceptible ot changes. and thc right to these changes is claimed, provided the)Y are comprehended within the scope oi' what is claimed.

The invention comprises further features and comhination of parts. as will he hereinafter set forth. shown in the drawings and claimed.

ln the drawings:

Figure l is a view showing an automobile wheel and a portion of the axle, disclosing the application o the automatic pumping' lt is obvious that each wheel of anv device constructed in laccordance with the invention;

Figure 2 through the same;

Figure 3 is an enlarffed detail view showirrer how the piston of the pump is held out of engagement with the operating cam on the axle; and

Figure 4 is an enlarged detail sectional view through the .nipple which carries the safety valve.

Referring to the drawings, 1 designates the front axle of an automobile. and 2 the' knuckle joint. between the axle and the stuh spindle 3. on which the front wheel 4 is journ nalecl. Fixed to the spindle is a cam 5. and securedloy suitable clamps (i to one ol the spokes of the wheel 4, at. a. point adjarent the usual ini'ating-valve tuhc T oi' the wheel is a pump. which comprises a. casing il. in which a piston 9 is mounted for reciprocating movements. The piston rod 10 passes through the end 11 of the pump c vliudcror casing and terminates `in a frainc 12. The frame 19. is prelicrahly Ll-shaped. though not nccesiauilv. and iournalcd in the arms 13 thereof is a shaft i4. carrying a wheel 15. This wheel is provided with a `'roovc lo. which is engaged h v the marginal edge ot' the cam 5, which is carried hy the spindhl oli the axle. hviously the cani is eccentrically disposed. and is designed to impart reciprocatinn` movements to the piston rod 10 of the piston. .l suitable coil springlq 17 is interposed hctwecn the end l1 oi the pump cylinder or casiu r and the frame 12. and

acts to hold the. wheel 15 at'all times in cn ragemcnt with the cani therefore as the wheel rotates. thc cam will i'orcc the piston radially through the pump cylinder. and when the wheel engages the short part of the cani or eccentric. the springr i7 will act to withdraw the piston radially toward the center oi thcwhecl. (lhviouslv as thc Wheel rotates rapidly` wirrcsponding movement will he imparted to thc piston, t'or the purpose of pumpini,r air into the tire.

The pump cylimh at one end terminates in a reduced part lo. which if', thraidcd to a nipple 1E). which in turn is connected at 2O to a tuhc 21. preiccrahly of lead'. though not necessarily. yThis tuhe Q1 is in turn connected to the usual iniating valve tulle 7, so that as the pistou of the pump reciprocates, air will he forced into the tire. The

is a vertical sectional View' -smes in the tube.

inatingjtnbe is povdd' with @be nsuai beek valve (notisbewn), b\1t"wbieb is designed prevent the escape of sii' during the remn movement. of che pisten.

The nipple is provided with an outlet opening-f :222, which is provided with :1 vaive sent fm tbe valve 235 in be engaged by :L .safety waive 24E. i ia'eiy mounted npnn the nipple 19 as an; 25, bee being; n coil spring 26 ini-exposed beween ihe side oivthe nipple and am adjusting devia-e carried by one, 'and of the safeby valve. This :nijusing device comprises s sere engagfei hrougb one end O be safey valve ,and u sclew holder 28., which is engaged by (me end of be spring 26. The gse'fey valve is designed m open when ie sir pressue in the tire' increases so as to eiieve tbe excessive pressure. iwi is possible adjust *die screw so tbz/ift 'tbe safety valve Wii open ascending tu different sir pres- Fm' instance ib@ scxew 2?' may be adjusts-ii, so bat the safety Valve may @pen ai; 4.@ minds pessul'e of ai? in ne nbe. ni' may e adjusted to open aff, 45,

50 o' pounds of nii` pressure, more m' Less.,

The saety valve is spam# mese/is,

29 is n suitable lacb or link 30, @he hooked end 39S of which is adapted to engage :L beaded pin 3i at the lower end ef the pump Cylinder' 8, so as to hold the piston up, with the Wheel 15 out' of engagement with the v@ann 0x' eccentric 5 on the spindle, after the ber being connected to the valve of the tire,`

a. pin carried by one end of 'ii'.ie cylinder, a iateh member carried by @be bracket and adapted to engage be pin to hoici said pist0n in said operative position.

in testimony whereof hereunto affix my signa-ture.

GEORGE NTHONY. 

